I have two signed posters:
Invader Zim (signed by Richard Horvitz! He spoke to me in his Zim voice while he was signed it, hee hee!)
Coraline (signed by Dakota Fanning and Teri Hatcher)

Anime related:
1. Three Blue Exorcist posters (My calendar for this year is Blue Exorcist themed. Of course I'm using the pictures as posters. Each page covers two months, so three of the posters are already up. I actually had a seventh (it was the front page), but I gave that to a friend)
2. Two Madoka Magica posters
4. Durarara!! wall scroll (Of Shizuo and Izaya)
5. Higurashi Kai
6. Ouran HSHC wall scroll
7. Pokemon World Face-Off (Technically a game poster, but whatever)
8. Soul Eater
9. Another Pokemon poster (This one is a long poster with pictures of each Sinnoh Pokemon)
10. K-ON! (promotional poster I got at Supanova)

Three different world maps of the world, river's of the world, and border's of country's. A beheaded and bloody stormtrooper hanging from a hook from Star Wars: Death Trooper. The maps from Oblivion and Skyrim as well as The Capital Eastland from Fallout 3.